SQLite engine: transactional seam — begin_tx, writer-slot lease, all eleven *_tx methods (task sqlite-engine-seam-tx)

alkstore-sqlite/src/substrate/mod.rs

@@ -40,10 +40,10 @@
 //! ops (`fork-rederive-queue-ops`, register D-12) live in
 //! `queue_ops.rs` — owned contract-v1 code, not lineage body.
 //!
-//! Port state (wave 2): the machinery below is ported but not yet
-//! wired by the engine layer (wave 3 wires `open`, the trait impl, the
-//! seam). A subset of the ported surface is therefore unreachable
-//! until that wiring lands.
+//! Port state (wave 2): the machinery below is ported; wave 3 wires
+//! `open` and the trait/seam impl. A subset of the ported surface
+//! remains unreachable until the mechanism tasks wire it (the
+//! `#![allow(dead_code)]` posture stays until the last wiring task).
 
 #![allow(dead_code)]
 #![allow(unused_imports)]
@@ -53,8 +53,27 @@ mod queue_ops;
 mod schema;
 mod watcher;
 
+pub(crate) use ops::{
+    arg_i64, arg_opt_i64, attach_alkstore_functions, in_savepoint, lock_acquire, lock_release,
+    lock_renew, stream_get_offset, stream_publish, stream_read_since, stream_save_offset,
+};
+pub(crate) use queue_ops::{
+    FireOpts, Stamps, ack, ack_batch, cancel, claim_batch, enqueue, fail, get_job, heartbeat,
+    queue_next_claim_at, retry, scheduler_register, scheduler_soonest, scheduler_tick,
+    scheduler_unregister, sweep_expired,
+};
 pub(crate) use schema::{
     Error as SchemaError, Readers, Writer, apply_default_pragmas, attach_notify, bootstrap_schema,
     open_conn, open_conn_bootstrapped,
 };
+
+/// Provision a fresh connection into the writer slot after a
+/// cancellation-path connection was consumed. Private helper over the
+/// substrate's bootstrapped open; the engine's tx handle captures it
+/// as its `reopen` closure's body.
+pub(crate) fn open_writer_connection(path: &str) -> Result<rusqlite::Connection, alkstore::Error> {
+    open_conn_bootstrapped(path).map_err(|e| match e {
+        SchemaError::Sqlite(inner) => alkstore::Error::database(inner),
+    })
+}
 pub(crate) use watcher::{DEFAULT_WATCHER_POLL_INTERVAL, SharedUpdateWatcher, WatcherConfig};